Protective gate for moving pictures.



m PATENTED JUNE 19, 1906.

L. BORIES. PROTECTIVE GATE FOR MOVING PICTURES.

APPLICATION PILED NOV. 15, 1905.

UNITED STATES PATENT orrron PROTECTIVE GATE FOR MOVING PICTURES..-

Specification of Letters Patent.

Patented June 19, 1906.

Application filed November 15, 1905. Serial No. 287.436.

To all whomit'may concern:

Be it known that I, LEON BORIES, a citizen of the United States,residing in the city and county of San Francisco and State of Cali- 5fornia, have invented new and useful Improvements in Protective Gatesfor Moving Pictures, of which the following is a specification.My'invention relates to a means for protecting the films of movingpictures from the concentrated light which i's used for illuminatingsuch pictures and which will ignite the films if by any means theapparatus should be mementarily stopped.

y invention consists of an automaticallyclosable gate or door and meansoperating it, so that the gate remains open while the apparatus is inmotion and is closed whenever the movement stops.

It also comprises details of construction which will be more fullyexplained by reference to the accompanying drawings, in which Figure 1is a front elevation of my device with gate closed. Fig. 2 is a planview show ing the gate open.

In the exhibition of what are known as "moving pictures the iilms aremoved across the shutter-inclosed space and are subjected to an intenseconcentrated light, by which they are projected upon a screen. As longas the films are in motion they pass rapidly enough to preserve themfrom undue heat from the concentrated light; but if the apparatus stopsthere is danger that the films will beignited and destroyed.

g It is the object of my invention to provide a means for protecting thefilms from such accident.

A is the frame, having an opening through it, across which opening thefilms ca ing the pictures are moved by suitable mec an ism, (nothere'shown) and the light which is used for illuminating the pictures isconcentrated upon the film within this opening.

In my invention I provide a gate 2, which is hinged to the frame A. Inthe present case I have shown the gate as being hinged so as to openoutwardly and. expose the film to the illuminating-light. Vhenclosedacross the opening, the light strikes the back of the gate and thefilm is protected.

3 is a crank-arm connected with one of the gate-pintles, and 4 is aconnecting-rod, one

5 5 end of which connects with the crank and the other with the slidablesleeve 5,'which is movable upon the stem 6.

8 represents the weights of a governor,which in the present case isshown as having bellcrank arms fulcrumed at the angles on a revolublepart carried by the stem or spindle 6,

and the inner ends of the arm engage with the slidable sleeve 5, andwhen the weights of the governor are thrown outwardly by centrifugalaction the sleeve will be moved upon the stem, and through theconnecting-rod and crank centrifugal motion ceases or falls to a certaindegree, the sleeve will be forced backwardly upon the stem byv means ofa spring 9, and thus acting through the arms of the governor brings theweights again to the center. This movement ofthe sleeve also acts,through the connecting-rod and crank, to close the door 2.

Motion maybe transmitted to the governor stem or spindle by any suitableI1'1GL11S either by belt, sprocket-chain, gearing, or other well-knownequivalent. In the present case I have shown a friction-roller at 10,carried upon the end of the governor-spindle and contacting with theperiphery of the flywheel 11 of the machine, so that while the the doorwill be opened. When the.

machine is in operation the rotation of the fly-wheel will betransmitted to operate the governor and hold the gate open. As soon asthe apparatus stops the gate will be closed,

as previously described, and the film protected from undue heat while itremains stationary.

In order to compensate for irregularities in the movement of themechanism by which the governor-spindle is revolved, one end of thespindle is journaled or stepped so that the spindle may have a littleside play at the opposite end which carries the frictional roller. Thisopposite end of the spindle is turnable in a box or journal 13, which isslidable upon a guide or support 14, and is normally drawn inwardly by aspring, as at 15. If there are any irregularities in the periphery ofthe driving-wheels, these will be compensated by the movement of thespindle held in position and relieved by the spring 15, so that thedriving-roller will always be held in contact with the pulley throughwhich it receives motion.

Having thus described my invention, what I claim, and desire to secureby Letters Patent,is-

1. The combination with a kinetoscope having afly-wheel, of a gate,hinged at one edge and turnable outwardly about hinges, and means bywhich; the gate is opened while the filrns are motion, and

closed when the motion ceases, said means including a governor and stem,a sleeve slidable on its stem, a'crank on the gate-axis, and

a connecting-rod between the sleeve and crank, and a friction-rollercarried on the governor-stem, and contacting with the'fiywheel.

2. The combinationwith a kinetoscope, of

a hinged gate, means for turning the gate outwardly about its hinges,said means in-- eluding a ball-governor and j ournaled stem turnable inunison with the movement of the film-carrying mechanism, an independentsp'ring-returned sleeve slidable on the stein, a crank on the gate-axis,and 'a connecting; rod. betweensaid sleeve and the gate-crank.

3. The combination with a kinetoscope, of

a hinged gate turnable outwardly about its hinges, a ball-governor andstem revoluble in unison with the movement of the film-carry ingapparatus, a slidable sleeve, bell-crank governor arms, the inner endsof which con} tact with the sleeve, a returning-spring on said steinhaving one end bearing EWiLlIlSt the sleeve, connections between saidsleeve and the gate, and a crank rigid with the hingepintle whereby thegate is opened while the films are in motion and closed when they ceaseto move.

4.- The combination with akinetoscopc, (if

a hinged atehaving a crank-arm, a governor, a ournaled stem andbell-crank arms by 'motion is transmitted to revolve ernor-stem.

which the overnor is carried, a sleeve slid able upon t e spindle, withwhich sleeve the inner ends of the arms cont-act, 'a spring adapted tobe compressed by the sleeve when the governor is extended by centrifugalaction, said spring returning the sleeve and the governor when themotion ceases, and a rod connecting the sleeve with the crank-arm of thegate, and a friction-roller through which the gov- 5-. The combinationwith a kinetoscope having an opening across which the films pass andthrough which they-are illuminated, of a gate closable over said openingwhen the motion. of the apparatus ceases,-a governor, a

spindle by which the governor is carried,

connections between the governor and the gate'whereby the latter isopened and closed,

' a frictional roller carried upon the end of the nessesr nEoN"B'o'RiEs. Witnesses:

' HENRY P. TRICOU,-

S. H. Nounsn.

. 5 my hand in presence of two subscribing wit-

